/// <summary>
///
/// </summary>
/// <param name="Value"></param>
protected virtual void OnObserverChanged(ObserverAngle Value)
{
if (ColorSpace != null)
{
ColorSpace.Observer = Value;
}
}
/// <summary>
///
/// </summary>
/// <param name="Xyz"></param>
/// <param name="Observer"></param>
/// <param name="Illuminant"></param>
public Luv(Xyz Xyz, ObserverAngle Observer = ObserverAngle.Two, Illuminant Illuminant = Illuminant.Default) : this(0, 0, 0, Observer, Illuminant)
{
var w = Xyz.X + (15d * Xyz.Y) + (3d * Xyz.Z);
var u = (4d * Xyz.X) / w;
var v = (9d * Xyz.Y) / w;
var y = Xyz.Y / 100d;
y = Xyz.Y > 0.008856 ? Math.Pow(Xyz.Y, 1d / 3d) : (7.787 * Xyz.Y) + (16d / 116d);
var mx = Xyz.Max[Xyz.Component.X, Observer, Illuminant].Shift(2);
var my = Xyz.Max[Xyz.Component.Y, Observer, Illuminant].Shift(2);
var mz = Xyz.Max[Xyz.Component.Z, Observer, Illuminant].Shift(2);
var rl = mx + (15d * my) + (3d * mz);
var ru = (4d * mx) / rl;
var rv = (9d * my) / rl;
var l = (116d * y) - 16d;
u = 13d * l * (u - ru);
v = 13d * l * (v - rv);
L = l;
U = u;
V = v;
}
/// <summary>
/// Initializes a new instance of the <see cref="Luv"/> structure.
/// </summary>
/// <param name="l"></param>
/// <param name="u"></param>
/// <param name="v"></param>
/// <param name="observer"></param>
/// <param name="illuminant"></param>
public Luv(double l, double u, double v, ObserverAngle observer = ObserverAngle.Two, Illuminant illuminant = Illuminant.Default) : this()
{
Observer = observer;
Illuminant = illuminant;
L = l;
U = u;
V = v;
}
/// <summary>
/// Initializes a new instance of the <see cref="Lch"/> structure.
/// </summary>
/// <param name="l"></param>
/// <param name="c"></param>
/// <param name="h"></param>
/// <param name="observer"></param>
/// <param name="illuminant"></param>
public Lch(double l, double c, double h, ObserverAngle observer = ObserverAngle.Two, Illuminant illuminant = Illuminant.Default) : this()
{
Observer = observer;
Illuminant = illuminant;
L = l;
C = c;
H = h;
}
/// <summary>
/// Initializes a new instance of the <see cref="Lab"/> structure.
/// </summary>
/// <param name="l"></param>
/// <param name="a"></param>
/// <param name="b"></param>
/// <param name="observer"></param>
/// <param name="illuminant"></param>
public Lab(double l, double a, double b, ObserverAngle observer = ObserverAngle.Two, Illuminant illuminant = Illuminant.Default) : this()
{
Observer = Observer;
Illuminant = Illuminant;
L = l;
A = a;
B = b;
}
/// <summary>
/// Initializes a new instance of the <see cref="Xyz"/> structure.
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="z"></param>
/// <param name="observer"></param>
/// <param name="illuminant"></param>
public Xyz(double x, double y, double z, ObserverAngle observer = ObserverAngle.Two, Illuminant illuminant = Illuminant.Default) : this()
{
Observer = observer;
Illuminant = illuminant;
X = x;
Y = y;
Z = z;
}
/// <summary>
///
/// </summary>
/// <param name="Rgba"></param>
/// <param name="Observer"></param>
/// <param name="Illuminant"></param>
public Xyz(Rgba Rgba, ObserverAngle Observer = ObserverAngle.Two, Illuminant Illuminant = Illuminant.Default) : this(0, 0, 0, Observer, Illuminant)
{
var Rgb = new double[3];
Rgb[0] = Rgba.Linear(Rgba.R);
Rgb[1] = Rgba.Linear(Rgba.G);
Rgb[2] = Rgba.Linear(Rgba.B);
for (int i = 0; i < 3; i++)
{
Rgb[i] = Rgb[i] > 0.04045 ? Math.Pow((Rgb[i] + 0.055) / 1.055, 2.4) : Rgb[i] / 12.92;
}
X = Rgb[0] * 0.4124 + Rgb[1] * 0.3576 + Rgb[2] * 0.1805;
Y = Rgb[0] * 0.2126 + Rgb[1] * 0.7152 + Rgb[2] * 0.0722;
Z = Rgb[0] * 0.0193 + Rgb[1] * 0.1192 + Rgb[2] * 0.9505;
}
/// <summary>
///
/// </summary>
/// <param name="Lab"></param>
/// <param name="Observer"></param>
/// <param name="Illuminant"></param>
public Lch(Lab Lab, ObserverAngle Observer = ObserverAngle.Two, Illuminant Illuminant = Illuminant.Default) : this(0, 0, 0, Observer, Illuminant)
{
double l, c, h = Math.Atan2(Lab.B, Lab.A);
if (h > 0d)
{
h = (h / Math.PI) * 180d;
}
else
{
h = 360d - (h.Abs() / Math.PI) * 180d;
}
l = Lab.L;
c = Math.Sqrt(Math.Pow(Lab.A, 2d) + Math.Pow(Lab.B, 2d));
L = l;
C = c;
H = h;
}
/// <summary>
///
/// </summary>
/// <param name="Rgba"></param>
/// <param name="Observer"></param>
/// <param name="Illuminant"></param>
public Lab(Rgba Rgba, ObserverAngle Observer = ObserverAngle.Two, Illuminant Illuminant = Illuminant.Default) : this(0, 0, 0, Observer, Illuminant)
{
var RLinear = Rgba.R.ToDouble() / 255d;
var GLinear = Rgba.G.ToDouble() / 255d;
var BLinear = Rgba.B.ToDouble() / 255d;
RLinear = (RLinear > 0.04045) ? Math.Pow((RLinear + 0.055) / (1 + 0.055), 2.2) : (RLinear / 12.92);
GLinear = (GLinear > 0.04045) ? Math.Pow((GLinear + 0.055) / (1 + 0.055), 2.2) : (GLinear / 12.92);
BLinear = (BLinear > 0.04045) ? Math.Pow((BLinear + 0.055) / (1 + 0.055), 2.2) : (BLinear / 12.92);
double x = RLinear * 0.4124 + GLinear * 0.3576 + BLinear * 0.1805;
double y = RLinear * 0.2126 + GLinear * 0.7152 + BLinear * 0.0722;
double z = RLinear * 0.0193 + GLinear * 0.1192 + BLinear * 0.9505;
var mx = Xyz.Max[Xyz.Component.X, Observer, Illuminant];
var my = Xyz.Max[Xyz.Component.Y, Observer, Illuminant];
var mz = Xyz.Max[Xyz.Component.Z, Observer, Illuminant];
L = 116d * Xyz.Fxyz(y / my) - 16d;
A = 500d * (Xyz.Fxyz(x / mx) - Xyz.Fxyz(y / my));
B = 200d * (Xyz.Fxyz(y / my) - Xyz.Fxyz(z / mz));
}
/// <summary>
///
/// </summary>
/// <param name="Rgba"></param>
/// <param name="Observer"></param>
/// <param name="Illuminant"></param>
public Luv(Rgba Rgba, ObserverAngle Observer = ObserverAngle.Two, Illuminant Illuminant = Illuminant.Default) : this(new Xyz(Rgba), Observer, Illuminant)
{
}
/// <summary>
///
/// </summary>
/// <param name="Color"></param>
/// <param name="Observer"></param>
/// <param name="Illuminant"></param>
public Luv(Color Color, ObserverAngle Observer = ObserverAngle.Two, Illuminant Illuminant = Illuminant.Default) : this(new Rgba(Color), Observer, Illuminant)
{
}
/// <summary>
///
/// </summary>
/// <param name="Component"></param>
/// <param name="Illuminant"></param>
/// <returns></returns>
public double this[Component Component, ObserverAngle Observer, Illuminant Illuminant]
{
get
{
switch (Illuminant)
{
case Illuminant.A:
switch (Component)
{
case Component.X:
return(1.0985);
case Component.Y:
return(1d);
case Component.Z:
return(0.3558);
}
break;
case Illuminant.C:
switch (Component)
{
case Component.X:
return(0.9807);
case Component.Y:
return(1d);
case Component.Z:
return(1.1822);
}
break;
case Illuminant.E:
switch (Component)
{
case Component.X:
return(1d);
case Component.Y:
return(1d);
case Component.Z:
return(1d);
}
break;
case Illuminant.D50:
switch (Component)
{
case Component.X:
return(0.9642);
case Component.Y:
return(1d);
case Component.Z:
return(0.8251);
}
break;
case Illuminant.D55:
switch (Component)
{
case Component.X:
return(0.9568);
case Component.Y:
return(1d);
case Component.Z:
return(0.9214);
}
break;
case Illuminant.ICC:
switch (Component)
{
case Component.X:
return(0.962);
case Component.Y:
return(1d);
case Component.Z:
return(0.8249);
}
break;
case Illuminant.D65:
default:
switch (Component)
{
case Component.X:
return(0.95047);
case Component.Y:
return(1d);
case Component.Z:
return(1.08883);
}
break;
}
return(0d);
}
}
